CN109190216A - A kind of continent river emptying into the sea auto-sequencing coding method based on DEM - Google Patents

A kind of continent river emptying into the sea auto-sequencing coding method based on DEM Download PDF

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CN109190216A
CN109190216A CN201810951179.7A CN201810951179A CN109190216A CN 109190216 A CN109190216 A CN 109190216A CN 201810951179 A CN201810951179 A CN 201810951179A CN 109190216 A CN109190216 A CN 109190216A
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continent
river
sea
emptying
data
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CN109190216B (en
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王坤
严登华
王浩
史婉丽
秦天玲
翁白莎
李相南
刘芳
徐婷
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China Institute of Water Resources and Hydropower Research
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    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/18—Network design, e.g. design based on topological or interconnect aspects of utility systems, piping, heating ventilation air conditioning [HVAC] or cabling
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/001—Model-based coding, e.g. wire frame
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
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Abstract

The continent river emptying into the sea auto-sequencing coding method based on DEM that the invention discloses a kind of, comprising the following steps: S1, the basic dem data for obtaining digital elevation model in setting continent region；S2, the boundary line that continent is determined according to basic dem data；S3, region segmentation is carried out to basic dem data, generates the River Data in each region；S4, vector quantization and merging are carried out to the River Data in each region, obtains the vector river in continent；S5, auto-sequencing is carried out to all rivers emptying into the sea in continent according to the boundary line and vector river in continent；S6, building autocoding model carry out autocoding to all rivers emptying into the sea in continent.The present invention solves the problems, such as that continent scale lacks river emptying into the sea autocoding.

Description

A kind of continent river emptying into the sea auto-sequencing coding method based on DEM
Technical field
The invention belongs to hydrology watershed discretization technical fields, and in particular to a kind of continent river emptying into the sea based on DEM is automatic The design of sorting coding method.
Background technique
It is to grind currently based on DEM (Digital Elevation Model, digital elevation model) simulation basin hydrologic process Study carefully one of the important channel of land-surface hydrological process and water resource.Water resources problems are increasingly prominent under climate change effect, to each The water resource situation in a continent carries out assessment and prediction has great importance.Wherein, carrying out coding to river is to carry out the hydrology The key condition of model and evaluation.The domestic and international river method being widely used at present mainly for single basin, such as The methods of pfafstter, binary.The drainage network codification of these watershed scales is relatively mature, but it is to continent The coding concern of a plurality of river emptying into the sea of scale is less.The river emptying into the sea of continent scale is entering sea due to the particularity in geographical location After river extracts aspect by the specially treated to terrain data, and quickly and accurately extracted River Data is compiled automatically Code provides data supporting further to carry out the modeling of large-scale hydrology data model, is conducive to the accuracy for improving hydrological simulation.
Summary of the invention
The purpose of the present invention is in view of the deficiencies of the prior art, propose that a kind of continent river emptying into the sea based on DEM is arranged automatically Sequence coding method, to solve the problems, such as that continent scale lacks river emptying into the sea autocoding.
The technical solution of the present invention is as follows: a kind of continent river emptying into the sea auto-sequencing coding method based on DEM, including it is following Step:
S1, the basic dem data for obtaining digital elevation model in setting continent region；
S2, the boundary line that continent is determined according to basic dem data；
S3, region segmentation is carried out to basic dem data, generates the River Data in each region；
S4, vector quantization and merging are carried out to the River Data in each region, obtains the vector river in continent；
S5, auto-sequencing is carried out to all rivers emptying into the sea in continent according to the boundary line and vector river in continent；
S6, building autocoding model carry out autocoding to all rivers emptying into the sea in continent.
Further, step S1 specifically:
The digital elevation model in setting continent region is cut using Arcgis platform, obtains the continent of 90 meters of resolution ratio Basic dem data.
Further, step S2 include it is following step by step:
S21, the raster data using Arcgis platform using DEM in basic dem data greater than zero as land data and are led Out, the dem data of continent land range is obtained；
S22, the dem data of continent land range is converted into vector data using Arcgis platform, obtains the arrow in continent Measure data boundary；
S23, each break in the vector data boundary in continent is converted into dot file using Arcgis platform, and with point Tandem of vector line segment, determines the boundary line in continent where attribute value records it.
Further, step S3 include it is following step by step:
S31, the dem data for being 1km by the dem data resampling of continent land range using Arcgis platform, and utilize Hydrology kit generates the gradient flow direction and gathering ground file of continent land range；
S32, the basic dem data in continent is divided by multiple regions according to gradient flow direction and gathering ground file；
S33, each dem data after segmentation is filled out respectively using the hydrology kit of Arcgis platform Hollow, flow direction and confluence cumulant calculate；
S34, the threshold value that confluence cumulant is arranged are 123456, generate the River Data in each region.
Further, step S4 specifically:
Vector format is converted by the River Data in each region, obtains the vector river of each region, and utilize Arcgis Platform merges the vector river of each region, obtains all vector rivers in continent.
Further, step S5 include it is following step by step:
S51, the space screening implement using Arcgis platform are filtered out and are intersected with the vector boundary generated step S22 All vector rivers in the continent that river section, i.e. step S4 obtain, obtain all rivers emptying into the sea in continent；
S52, the spatial analysis tool using Arcgis platform are calculated nearest with each river emptying into the sea in continent distance Boundary break, and obtain the serial number of the break；
S53, the field sequencing tool using Arcgis platform, the break serial number obtained according to step S52, according to ascending order pair River emptying into the sea is ranked up and assignment again, realizes the auto-sequencing to all rivers emptying into the sea.
Further, step S6 specifically:
Using the model builder tool of Arcgis platform, building can generate the autocoding of continent river emptying into the sea Model, and utilize the autocoding model, according to the auto-sequencing result of all rivers emptying into the sea in continent it is all to continent enter Haihe River Stream carries out autocoding.
The beneficial effects of the present invention are: the present invention is based on the basic dem data of digital elevation model in each continent region, In conjunction with the relevant process tool and algorithm in Arcgis platform, may be implemented to continent river emptying into the sea, it is especially big to being distributed in The section of continent boundary estuary carries out auto-sequencing and coding, efficiently solves continent scale in the prior art and lacks river emptying into the sea The problem of autocoding.
Detailed description of the invention
Fig. 1 show a kind of continent river emptying into the sea auto-sequencing coding method based on DEM provided in an embodiment of the present invention Flow chart.
Fig. 2 show South America river cataloged procedure figure provided in an embodiment of the present invention.
Fig. 3 show South America river provided in an embodiment of the present invention code pattern.
Specific embodiment
Carry out detailed description of the present invention illustrative embodiments with reference to the drawings.It should be appreciated that shown in attached drawing and The embodiment of description is only exemplary, it is intended that is illustrated the principle and spirit of the invention, and is not limited model of the invention It encloses.
The continent river emptying into the sea auto-sequencing coding method based on DEM that the embodiment of the invention provides a kind of, such as Fig. 1 institute Show, include the following steps S1-S6:
S1, the basic dem data for obtaining digital elevation model in setting continent region.
In the embodiment of the present invention, by taking the dem data of the SRTM of 90 meters of resolution ratio as an example, is cut and set using Arcgis platform Digital elevation model in the region of continent obtains the basic dem data in the continent of 90 meters of resolution ratio.
S2, the boundary line that continent is determined according to basic dem data.
Step S2 include it is following step by step:
S21, the raster data using Arcgis platform using DEM in basic dem data greater than zero as land data and are led Out, the dem data of continent land range is obtained.
S22, the dem data of continent land range is converted into vector data using Arcgis platform, obtains the arrow in continent Measure data boundary.
S23, each break in the vector data boundary in continent is converted into dot file using Arcgis platform, and with point Tandem of vector line segment, determines the boundary line in continent where attribute value records it.
S3, region segmentation is carried out to basic dem data, generates the River Data in each region.
Step S3 include it is following step by step:
S31, the dem data for being 1km by the dem data resampling of continent land range using Arcgis platform, to subtract Few data volume and raising computational efficiency, and flow to and catchment using the gradient that hydrology kit generates continent land range Area file.
S32, the basic dem data in continent is divided by multiple regions according to gradient flow direction and gathering ground file, in order to Improve computational efficiency.
S33, each dem data after segmentation is filled out respectively using the hydrology kit of Arcgis platform Hollow, flow direction and confluence cumulant calculate.
S34, the threshold value that confluence cumulant is arranged are 123456, generate the River Data in each region.
The river threshold value as specified in " Chinese river name code " is 1000km2, it is approximately equal to 123456 90 meters points The DEM grid gross area of resolution, therefore the threshold value of setting confluence cumulant is 123456 in the embodiment of the present invention.
S4, vector quantization and merging are carried out to the River Data in each region, obtains the vector river in continent.
In the embodiment of the present invention, vector format is converted by the River Data in each region, obtains the vector river of each region Stream, and merged the vector river of each region using Arcgis platform, obtain all vector rivers in continent.
S5, auto-sequencing is carried out to all rivers emptying into the sea in continent according to the boundary line and vector river in continent.
Step S5 include it is following step by step:
S51, the space screening implement using Arcgis platform are filtered out and are intersected with the vector boundary generated step S22 River section (i.e. all vector rivers in the continent that step S4 is obtained), obtains all rivers emptying into the sea in continent.
S52, the spatial analysis tool using Arcgis platform are calculated nearest with each river emptying into the sea in continent distance Boundary break (i.e. the break in the vector data boundary of continent that step S23 is generated), and obtain the serial number of the break.
S53, the field sequencing tool using Arcgis platform, the break serial number obtained according to step S52, according to ascending order pair River emptying into the sea be ranked up and according to 1,2, the sequence of 3... to its assignment again, realize the automatic row to all rivers emptying into the sea Sequence.
S6, building autocoding model carry out autocoding to all rivers emptying into the sea in continent.
In the embodiment of the present invention, using the model builder tool of Arcgis platform, building can generate continent and enter sea The autocoding model in river, and the autocoding model is utilized, according to the auto-sequencing result pair of all rivers emptying into the sea in continent All rivers emptying into the sea in continent carry out autocoding.
Using South America as example area in the embodiment of the present invention, river emptying into the sea cataloged procedure in boundary is as shown in Figure 2.Fig. 2 (a) Indicate example area basis DEM；Fig. 2 (b) indicates the point that the break for the vector linear barrier for forming example area after DEM processing is converted into File；All vector rivers information in Fig. 2 (c) expression example area；Fig. 2 (d) indicates all river emptying into the sea polar plots in example area；Figure 2 (e) indicate to carry out auto-sequencing and coding to all rivers emptying into the sea.
Final example area boundary river emptying into the sea coding result is as shown in figure 3, in order to further show river emptying into the sea coding Details intercepts respectively and is exaggerated the top (Fig. 3 (b)) in example area, middle part (Fig. 3 (c)) and lower part (Fig. 3 (d)).
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this hair Bright principle, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.This field Those of ordinary skill disclosed the technical disclosures can make according to the present invention and various not depart from the other each of essence of the invention The specific variations and combinations of kind, these variations and combinations are still within the scope of the present invention.

Claims (7)

1. a kind of continent river emptying into the sea auto-sequencing coding method based on DEM, which comprises the following steps:
S1, the basic dem data for obtaining digital elevation model in setting continent region；
S2, the boundary line that continent is determined according to basic dem data；
S3, region segmentation is carried out to basic dem data, generates the River Data in each region；
S4, vector quantization and merging are carried out to the River Data in each region, obtains the vector river in continent；
S5, auto-sequencing is carried out to all rivers emptying into the sea in continent according to the boundary line and vector river in continent；
S6, building autocoding model carry out autocoding to all rivers emptying into the sea in continent.
2. river emptying into the sea auto-sequencing coding method in continent according to claim 1, which is characterized in that the step S1 tool Body are as follows:
The digital elevation model in setting continent region is cut using Arcgis platform, obtains the basis in the continent of 90 meters of resolution ratio Dem data.
3. river emptying into the sea auto-sequencing coding method in continent according to claim 1, which is characterized in that the step S2 packet Include it is following step by step:
S21, the raster data using Arcgis platform using DEM in basic dem data greater than zero as land data and export, and obtain To the dem data of continent land range；
S22, the dem data of continent land range is converted into vector data using Arcgis platform, obtains the vector edges in continent Boundary's data；
S23, each break in the vector data boundary in continent is converted into dot file using Arcgis platform, and with the attribute of point Tandem of vector line segment, determines the boundary line in continent where value records it.
4. river emptying into the sea auto-sequencing coding method in continent according to claim 3, which is characterized in that the step S3 packet Include it is following step by step:
S31, the dem data for being 1km by the dem data resampling of continent land range using Arcgis platform, and utilize Hydrology kit generates the gradient flow direction and gathering ground file of continent land range；
S32, the basic dem data in continent is divided by multiple regions according to gradient flow direction and gathering ground file；
S33, each dem data after segmentation is carried out filling out hollow, stream respectively using the hydrology kit of Arcgis platform To and confluence cumulant calculate；
S34, the threshold value that confluence cumulant is arranged are 123456, generate the River Data in each region.
5. river emptying into the sea auto-sequencing coding method in continent according to claim 4, which is characterized in that the step S4 tool Body are as follows:
Vector format is converted by the River Data in each region, obtains the vector river of each region, and utilize Arcgis platform The vector river of each region is merged, all vector rivers in continent are obtained.
6. river emptying into the sea auto-sequencing coding method in continent according to claim 5, which is characterized in that the step S5 packet Include it is following step by step:
S51, the space screening implement using Arcgis platform filter out the river intersected with the vector boundary generated step S22 All vector rivers in the continent that section, i.e. step S4 obtain, obtain all rivers emptying into the sea in continent；
S52, the spatial analysis tool using Arcgis platform are calculated with each river emptying into the sea in continent apart from nearest boundary Break, and obtain the serial number of the break；
S53, the field sequencing tool using Arcgis platform, the break serial number obtained according to step S52, according to ascending order to entering sea River is ranked up and assignment again, realizes the auto-sequencing to all rivers emptying into the sea.
7. river emptying into the sea auto-sequencing coding method in continent according to claim 1, which is characterized in that the step S6 tool Body are as follows:
Using the model builder tool of Arcgis platform, building can generate the autocoding model of continent river emptying into the sea, And the autocoding model is utilized, all rivers emptying into the sea in continent are carried out according to the auto-sequencing result of all rivers emptying into the sea in continent Autocoding.
CN201810951179.7A 2018-08-21 2018-08-21 Automatic continent sea-entering river sequencing and encoding method based on DEM Active CN109190216B (en)

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